4 results about "S system" patented technology

Techniques for secure booting of Unified Extensible Firmware Interface (UEFI)-compliant devices are described. In one example, execution of a driver associated with a hardware component of a computing device can be detected during boot of the computing device. Based on the detection, a first driver hash of the UEFI's system table can be calculated, where the system table is a data structure that stores configuration details of the computing device and UEFI services. Thereafter, based on detecting completion of the driver's execution, a second driver hash of the system table can be calculated. The first driver hash and the second driver hash can then be compared to determine tampering with the UEFI's system table.

This invention proposes a method for clock calibration of an SPI device, comprising the following steps: Step 1: When the master device in the SPI device performs a write operation, the master device pulls the CSN signal low and provides 48 consecutive SCK clock signals; after the slave device detects that the CSN signal is low, it starts counting from the rising edge of the first SCK clock signal, and the counter starts counting from 0; the counting frequency is the high-frequency clock f inside the slave device. HSI When the slave device detects the 48th SCK clock signal, the counter stops counting and stores the count value CNT in the slave device's register; Step 2: The master device reads the count value CNT held in the slave device's counter register; Step 3: Calculate the slave device's system clock f based on the count value. HSI Step 4: The master device writes the correction compensation value, i.e., the correction frequency mentioned in step 3, into the corresponding address of the slave device's register to complete the clock correction.

The present application discloses a time synchronization method, device, and readable storage medium, relating to the field of information technology. The time synchronization method provided by the present application pre-acquires the user's system configuration by setting a bit in the BMC's impi, modifies the impi bit based on whether the user's system configuration's RTC time includes a time zone, and determines whether the BMC's preset time zone needs to be added based on the impi bit to set the time and obtain the correct time. Compared with the existing method of directly synchronizing the user system's RTC time through the BMC, the method can obtain the correct time even when the user system's RTC time includes a time zone.

The present invention discloses a multi-level cache and file batch download method, system and storage medium, which belongs to the field of computer storage technology. The method includes: S1: the object storage gateway kernel loads the file list, and assembles and deduplicates the file list; S2: setting the file upload threshold, grouping small files, and sharding large files; S3: using the number of small file grouping threads plus the number of large file sharding threads to calculate the number of threads that need to be opened by the cloud storage gateway; batch opening multiple threads for file download; S4: after the cloud storage service end obtains the file, it caches it according to the first heat threshold. It has stronger reliability and adopts the NDN+IP-based C / S system structure. Even if the central server fails, the customer business system will not be affected at all when the edge network connection is normal. It has stronger security and the files are uploaded using block-by-block deduplication and encryption. Compared with traditional object storage, it greatly reduces the risk of data leakage.